Across
- 1. to fill with more inhabitants than available resources can sustain
- 3. selection a natural process of evolution in which the organisms that are best
- 6. structure, as opposed to gradual evolutionary change
- 9. a way of hiding something by covering or
- 10. a condition that causes harm to the health of a person, animal, or plant;
- 11. or unhealthy; contaminant.
- 12. an animal that hunts other animals for food
- 13. a sudden, apparently abnormal change or alteration in a genetically
Down
- 2. to their environment survive and are able to reproduce, while those that are
- 4. an animal being hunted, caught, and eaten by another animal
- 5. leave fewer or no offspring
- 7. sickness
- 8. something that pollutes, esp. a waste substance that makes air, water, or land